title: Chirality transfer in 1D self-assemblies: influence of H-bonding vs metal coordination between dicyano[7]helicene enantiomers.
abstract: Chiral recognition as well as chirality transfer in supramolecular self-assembly and on-surface coordination is studied for the enantiopure 6,13-dicyano[7]helicene building block. It is remarkable that, with this helical molecule, both H-bonded chains and metal-coordinated chains can be formed on the same substrate, thereby allowing for a direct comparison of the chain bonding motifs and their effects on the self-assembly in experiment and theory. Conformational flexure and both adsorbate/adsorbent and intermolecular interactions can be identified as factors influencing the chiral recognition at the binding site. The observed H-bonded chains are chiral, however, the overall appearance of Cu-coordinated chains is no longer chiral. The study was performed via scanning tunneling microscopy, X-ray-photoelectron spectroscopy and density functional theory calculations. We show a significant influence of the molecular flexibility and the type of bonding motif on the chirality transfer in the 1D self-assembly.
authors.affiliation: Department of Physics, University of Basel , Klingelbergstrasse 82, 4056 Basel, Switzerland.
authors.forename: Aneliia
authors.initials: A
authors.lastname: Shchyrba
authors.forename: Manh-Thuong
authors.initials: MT
authors.lastname: Nguyen
authors.forename: Christian
authors.initials: C
authors.lastname: Wäckerlin
authors.forename: Susanne
authors.initials: S
authors.lastname: Martens
authors.forename: Sylwia
authors.initials: S
authors.lastname: Nowakowska
authors.forename: Toni
authors.initials: T
authors.lastname: Ivas
authors.forename: Jesse
authors.initials: J
authors.lastname: Roose
authors.forename: Thomas
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authors.lastname: Nijs
authors.forename: Serpil
authors.initials: S
authors.lastname: Boz
authors.forename: Michael
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authors.lastname: Schär
authors.forename: Meike
authors.initials: M
authors.lastname: Stöhr
authors.forename: Carlo A
authors.initials: CA
authors.lastname: Pignedoli
authors.forename: Carlo
authors.initials: C
authors.lastname: Thilgen
authors.forename: François
authors.initials: F
authors.lastname: Diederich
authors.forename: Daniele
authors.initials: D
authors.lastname: Passerone
authors.forename: Thomas A
authors.initials: TA
authors.lastname: Jung